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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71d953bc5dc37f45b0f8308ecbb6beb7773c047149adf3bf4ea73c4be58a026b' 
  AND token = 'AAjlFFA7/OZqs+1wgogopiCgpsjmc3dnKidEucQS1l8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}