Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '649f068d20085a20048279eff7f87e26b01c0e2fa0954ed1b309b8ac1cc28640' 
  AND token = 'mr7EM0IHsd8d0vs+91hu4W4E/BOKvmDyeB2vJtjQC6Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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