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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'f83dfb12ae739a742e59a2986d183fcc8a7ca5eb2cea35a9a212e2eaefcfb422' 
  AND token = 'xzIhfnpNaZ6cU+MV7ZtUW1n9WNDh61T7kcNR5j4lryo=' 
  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"
    }
  }
}