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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '82fc75295e329bbdae99ecbd20e4608a43d0a06a1c62bf98118e3bf183fb5de1' 
  AND token = 'hAkbTn0NOp39MRYu680IhH/wibXZWUYsj2OtMQKwD2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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