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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '23b9c11751299570581c46e79365fe91d1d99ab3776316aaf50816bc00bd253e' 
  AND token = 'zZofaD3oOZ8lOH19E1v1K0qxHq/3RoVYGc6KDcDxD6I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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