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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4d1247e548e15e6a5024e663ff8706a87951b0812d0b672bae18c2412876fee' 
  AND token = 'HokmM20FJ9oPCoxAtICMPIzsj9G2VN9pc5XEjSuNYj4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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