Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8c6930b1dcc3ad17ec3f2135250c2c4d612a331a09306b20b5dd2132614fdd2' 
  AND token = 'w+0/DmVGuZjuzyuRLakgAamR2Qx16OWDzcdIM1o4txI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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