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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7ccbd59910d03d1f5ac0e9ad04a8abb8ed2dc18e94c555f80f1abd5ef0d1602b' 
  AND token = 'IPA67QdhGS1c4zCJ0vMGsajNMt8dhY7Icax7J4pLWPA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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