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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c3cf946e139e08db7b980124b67e8691d240a7e23567d2ffe229b346be828d79' 
  AND token = 'CA/ZTk8ffbFRmB4eXh4f8j0gNST4lrx+3gD0Dyg0gXE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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