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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd97130cfc0945783edc98eb4c1ef85760f7182ffa9ba89e85035cca51d6055c' 
  AND token = 'YW/MgrIUFzn0NX/rdAofSzKJK1wGb6ZpOzh1JfJpWco=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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