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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2aed7e4f35d3ad2f684a724ffbd2f06d6e797c4da05021bd3a953fc326444f21' 
  AND token = 'GZM1mbfzy2MawdMc0rHfv+t/Eg/10KXbVMOYqTm5M2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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