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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8046f9d2e2afb618d41567acf86e2531568e773ce8a10c71a5e7fd75126732de' 
  AND token = 'JH8dOqEisdxnS1ZvSOiVWHPwHq/9FwbIJqA7yOrp4VM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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