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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '417f1b2bccaf0f12f8370abfec86218b4188fd1aabb7f6d8e404549ac41438e6' 
  AND token = 'icwk3xg/PzAblqg6/4rEnRFLAdyS1SG7ELGtiQmbBEo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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