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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71caa9f9097ce0414c21fa6b41d090bfe1f82fd8a948ef059ecdef23c67b92eb' 
  AND token = 'BJRdyqaONnlXjInEyDGycCMV5nh6ZFpEob5n7bqsDAU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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