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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a3b9fcda4f0f1a74c78c4e0889dea125515cf0518b03fa0e383ba2a17a5320a' 
  AND token = 'Qkfi6U56AEqjgpG6uHqJFUNCgU7tMrJLtSkU1J8aQYs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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