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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01ba13389cb6c69d9d8e0f42718dc6b99b53987c76ef97db90c0311fd611b19e' 
  AND token = 'gt5mcyfz/JtaEMD8+Ll5C0pKouaIscf9B7UNM5sgogA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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