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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0d80417230d9304b6219b6c86614f17fad302e0f3bfa6834c196553fd7802a2e' 
  AND token = '+k1Ab1dB8YNnIjWj7NfBjDTv5ovsqNYWl0AypauwNWE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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