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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '5acee51743ed2d27b67dc2fdfe83872de102f3e685a92482597c0ded65d29590' 
  AND token = '70+EuxjdHA0iX2YTGgVNAQeg8KmCKjRTF5aZj0gRoOE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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