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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd080c50ac682dfda7e23ff51907f68196dad26bd04dd8ec8ae476ee8e54659b5' 
  AND token = 'efj7J1Oud1Pi02mdMnUBzu1av4rHPnPGCjRRgddy8HQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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