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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '074cae9a77daf6046cd86f9d3c4ad3c21169527331eb65ad5e3cd56bd4f8575c' 
  AND token = 'KjOsbWKnl3zmSwuGuXlr23XggrDZ8rA93J3AAvbpAg0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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