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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58c30cccc5bd553534af89216d376667679f4f76f34437c40a9c718b26448bd9' 
  AND token = 'qqFNJvrYe9g76nELQ57I59X8gmFiTfdZrNvCiO2ikwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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