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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '489f14730ce582ef196ba926c173298fa59b23ac9eff0a8ea8561ac2a7a52151' 
  AND token = 'BqAu+wGDcVRuzhU/1sZcM/dsed/c53uEWjcc3T5IqSk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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