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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '201279943c120c15c015df6ad4f8b54ff15b681788bf2c711dfe422b708cdf8a' 
  AND token = 'my0LR9TDn+3aNmsi+ygmOMjAfRYmy6spI5Oj7WY7DiE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}