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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85ebd2bd334efd5e19d3a5a1289eb87e1b9265ed3c6678e9afcd30e68d495d07' 
  AND token = '/85fbrSw+idx2YEI4u1HuQqVbSp9aKlHFa07fevDKl0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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