Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aeca97f7cd4383b2cb2b0ed054c86b7312704bf60d5c6571de28dd7b60f409a9' 
  AND token = 'pK10KIFY2VqdUmtI2akumB2gmtGra81a2CZUBWQa7U0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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