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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '52c45417c6b798de8d836cd6c52289b0de9318111cd9abf8689533d6c922968b' 
  AND token = 'tRAlzP8cW6Vh99LrYh4wkhDjcTG42h1aucK1orleGq0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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