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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '132e046c87f608c3f25193b269d028d28813accf21929545d8fb735c241b728e' 
  AND token = 'TZT7j+/OeQK6e9lOTAQfWiv80y4P1k3qscYzIzcXfw8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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