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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22f5743d425697a10f100e3a97b3e7bd6044cae3eb99b06b2f3d4c739e7f6fd6' 
  AND token = 'YN7bzOdav7goOqZzLl7McW7PDtG9LNArnJeXdk+Wekk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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