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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74e761bd7c0b85f69a53ddd91915c040b73b91debc4ec3a1d499d14b8f5ab152' 
  AND token = 'CAYrCfWxZ31NCvCsAWh6a+rJpTSvxRe1BMSyZx+BGnc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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