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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae89595b3ad698e114f0f70de93d6d5e02c80fadfa21221319b3fef86e114b41' 
  AND token = 'gl6/BObKu+bSqwSUs51AxtypKrQ/Q6ZejzXfcWPZEzc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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