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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0109c4bd0aad9bd3e840e0b8968e1d21f74ef804cadc05e87c4d39efdedf6fbb' 
  AND token = 'ilyJNBLUv/Oxv4B+SroukKgIX1xm82FC9Cpo193YMRA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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