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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93f7ab3a0ad34babddd4b20f3bbaf0d05e76ce6b7e3b2bc2bef5b2bcae56d286' 
  AND token = 'jAbQ83F/wjtWXOm4mlBIWJHHH+kfhH6Zg/mM28oXebk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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