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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ceea13818872a8bb85547698ec1b19d7224504ba8886f0f9291bade7cf4daf8' 
  AND token = 'F4oBtLW1mCvufO9DEH2QK2BLZp3j49aEi4vCZdqHy4U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00195

JSON explain

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