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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cf45f449d275204625af57acc14028939a7ecb23815211401308f4db5ef467ec' 
  AND token = '8rwaUogLt3kb3H6ur7cPq/Zs1ZVqpf20sh63PdPQlew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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