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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07fba876a4f053702f76df4527c784330f2b80949d3fff1c50afa7728782c3ff' 
  AND token = 'AjaN2I9DLV4DZwKxiwZZn1jV4+v/lWcEepLNexRYYfA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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