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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '65abba1683d0e8dbc358ca904b291fc479560418ca9068d947b93f2bef561080' 
  AND token = 'JSQy5Ip0sdso9DxzFBICfPP2K58M+0OMNrIubT1GLRc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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