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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b059d540dafc43f789df20e980d13adb6f35a0e537e3722390f22b44eeef5f9' 
  AND token = 'UMCoge0bZm6NumLLj6ydn8pPDQWQsmeaSxD8Fpc9ggc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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