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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '932f832004114da952d8165816b7d4a0b6cbfe42ba2d3fc8982a3a5f27680a4d' 
  AND token = 'gwKkaxLjBM8kq+bSQL/4Q3RyaS5b57dOQtUTp4txLn4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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