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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01d21e34f21b89780a1e08ae2643f9fd6eb4c9615679af4e1bd3d2c13d13aa3d' 
  AND token = 'poVuA+63mbbopf+pSOpdeSUnT/+PG3Md/IVnvm7XByY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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