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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9e9a6abea59b02c904b61cefd5c216a948fcb6c1c0673b6d21f01d59e173970f' 
  AND token = 'O4vxEYGQsFYbl1ztPtAp5d0WVXFChDdYQynNPu6OA14=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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