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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5cf1f60da09f6f8586c2f1aff30ff4451cf295ab317e1cf287acd29b0abbbb24' 
  AND token = 'G89S4PcoEu6dyied7xozYbQtuBpOVfIb2O9032UbMeY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01036

JSON explain

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