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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bee10efd3703fd355629dc2d39019e062713d7063e434a01d19910267182c377' 
  AND token = 'NqW1wlBhVpP75HpCHibirt/iMuZnYoQT+prixzYrN+M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00275

JSON explain

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