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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd143ae2b2f755a1ba41bce36d347c0e6fff145ba10a2b28ce5b583e19f9b5167' 
  AND token = 'b95wwW3uFdEN9Cz6zI/ZbIQ/nDenfCbiQSQ7fOQXVkI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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