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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7bdb85bc39bb1b988a7af6bb6e8359c80ca938d833fcb3c62ea2dd74df46494a' 
  AND token = '0febS1KyHKEh7J3wRRmsLj1QGk9+iJdiOSbrKzTCSaY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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