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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '22c6b70588f4788f13e16c1aff1ed3a4d1c63251445156778978f3e7384e86ce' 
  AND token = 'jkbNc7wYo0V2eX7NV10Z+9i44PBOU5I+gsqeTA3JE9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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