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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '065abf32c9eefbaab7b3a46ed81c20eb4435df69567ff56e02561b15fc2b26aa' 
  AND token = 'Ov90W1EbLhPTH9N5UWm977GK9KqAOLXrkdbc1i3sPvw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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