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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '505a4a41a5885020d650c9385afd43a930a783356a008f5292dea9e33697709c' 
  AND token = 'GOvIkD3n8RFXV1K2LCfbpFTlByU5yenq6PoBs//VyUE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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