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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0e23826a66bc28661b47013b786d38acf8ebaae2488ae458b463f02d0435c86' 
  AND token = '9uQchH3KoHGv4cTDQWAk17wrXEoXJ2psBZNCsS2NcQ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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