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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d214b666b733f193a551aa87ecfbdac8862cf945c6f08a6803849fff8246c2a' 
  AND token = 'kb4saYOUO1uatLxbGAR9fAvxrQQDbnw4ufZXM9SqEKM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00140

JSON explain

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