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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e74de07a9381cec3b84044dfa1ab913ee9331c4328a83a6b5a256c6a7ca84de9' 
  AND token = 'y5I4Ye3scywB8ZWZy3VzEqXyLbUMVvNQ43gn9A8/G2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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