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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1de081b63e6644dd9170542a3d2722d0759c3bc2cc6604698fff93990a2e4925' 
  AND token = 'iAca+mly5IexZ01hcMFHxYu1Od4qvV12u6a0ilK/JbI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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