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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7b3bdc1458995f992598d057964c350d7c0155e1e89216e468d1b3dabe49cf2' 
  AND token = '1brEZOfhD75NFM3Hc41SZK+mCy98W2InBiM/vgV60sE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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