SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94a37c1b84c17989a26509ac7c0c18fb72a72fe336966828463669fcfd93863b' 
  AND token = 'MxPmwhO2zKB3VmubUbY05jnZ2mFIbFqleLU/ZgRUTmE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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