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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60f498c2d2ad7599cbbcf245301adf962eb8141d8ab9dc9c5b9589e594ce32ae' 
  AND token = 'q/X0Vo02/St0iGcbwX0foxB7Vx+TBwoObQ6epBvTDNU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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