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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '046fa5f1e605ab23323177bb96ca1a882ac778a1dd170899dfe481fa2feabc7c' 
  AND token = 'Gnv79BhNmkeO3ype6UIaR2xg6agNTXiljx2C8kiDCDc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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