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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd2629304021a50b5ca39f59c5d59b69a2a468ee08c335960fb9bc8b19d69de12' 
  AND token = '4R3HHYAlI7bIfgfViPhFQ3Zm2eLpMVW4IgSCs1H5zl0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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