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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d13f6cf076ac1a9ec7ee61e9e2c310215553c57775b975d54d6a2ebdd510a2a' 
  AND token = 'qPFSwNmNH6yNSDRG8WC3eZd/YzwixSutdq+lcSOOrT8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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