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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86a33d4b19207193a9ddd1783a1b39c07f6a2b28f2c7bfdd0bb7456533495178' 
  AND token = 'ylwyUcv7Umy6GAvK2Y9+JeFpRae32adSJZAdTFiVD4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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