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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b59da3c3cd6aaa4c4d04b6ce675a73413c475b5e02458668ae31c50412328fe' 
  AND token = 'rq56L57/nEsB5eXCKbcpnR1HcnOih/w9sDewxdVvzG4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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