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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '6febba325fb03160b0847336e5e4a354722c01a5b7db297864def78c013dcba0' 
  AND token = 'L9m+kyq/jF8cgcQ0o7kis/1p1uRDr0X9Z0yS6pTpBMU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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