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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62e8f74eb4e5f4a7305f6a85f82ccb3a6f3c9b3eea0e97801c926b37b8cb35d7' 
  AND token = 'o1OYhM9my5tQ3jW3gxFo1agU2oVFBxc8sKiQjoFCLsY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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