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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '178822f58405ca4d1e859ffcd5032b33fac917f615548b6a45c87dfa21c3bc45' 
  AND token = '+QAuDi6AluFhB895A2swndhUdvtVHYfjMCWMaEhrx9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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