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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c8d2578cd925d288a13b036449ee92e54ebd4ad8ac365a407ee9af422b4942ce' 
  AND token = 'Z432tR8vOkxisJ4mF0OkmpcsosfqtXDA81J7ujx3BYE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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