Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c67500039d0624e654380df30126acc9644d1f3ac1a01972e842ab5c231b777' 
  AND token = 'MPRSB2kdX5sRl1Tr8Cn76M7h1No5/WDmFvQwIITLNKQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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