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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee071d0a8025d5e07a0b5ea008c76f7f08e4e049bdea307ce93dfa4ccfe5466d' 
  AND token = 'WIhAOBX9EE0E6OXjJoBESTxL1HotCqTrIUNa3/fWBA4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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